The term 'WHEEL and axle' is a simple machine consisting of two parts: a WHEEL and an axle. The WHEEL is a circular object that rotates around the axle, which is a cylindrical rod that passes through the center of the WHEEL. The WHEEL and axle work together to transfer force from one point to another, allowing for the movement of objects with less effort. This type of machine has been used since ancient times and is still used today in many applications, such as cars, bicycles, and even toys.